1 /* 2 * Copyright (C) STMicroelectronics SA 2014 3 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> 4 * Fabien Dessenne <fabien.dessenne@st.com> 5 * for STMicroelectronics. 6 * License terms: GNU General Public License (GPL), version 2 7 */ 8 9 #include <linux/clk.h> 10 11 #include <drm/drmP.h> 12 #include <drm/drm_atomic.h> 13 #include <drm/drm_atomic_helper.h> 14 #include <drm/drm_crtc_helper.h> 15 #include <drm/drm_plane_helper.h> 16 17 #include "sti_compositor.h" 18 #include "sti_crtc.h" 19 #include "sti_drv.h" 20 #include "sti_vid.h" 21 #include "sti_vtg.h" 22 23 static void sti_crtc_enable(struct drm_crtc *crtc) 24 { 25 struct sti_mixer *mixer = to_sti_mixer(crtc); 26 struct device *dev = mixer->dev; 27 struct sti_compositor *compo = dev_get_drvdata(dev); 28 29 DRM_DEBUG_DRIVER("\n"); 30 31 mixer->status = STI_MIXER_READY; 32 33 /* Prepare and enable the compo IP clock */ 34 if (mixer->id == STI_MIXER_MAIN) { 35 if (clk_prepare_enable(compo->clk_compo_main)) 36 DRM_INFO("Failed to prepare/enable compo_main clk\n"); 37 } else { 38 if (clk_prepare_enable(compo->clk_compo_aux)) 39 DRM_INFO("Failed to prepare/enable compo_aux clk\n"); 40 } 41 42 drm_crtc_vblank_on(crtc); 43 } 44 45 static void sti_crtc_disabling(struct drm_crtc *crtc) 46 { 47 struct sti_mixer *mixer = to_sti_mixer(crtc); 48 49 DRM_DEBUG_DRIVER("\n"); 50 51 mixer->status = STI_MIXER_DISABLING; 52 } 53 54 static bool sti_crtc_mode_fixup(struct drm_crtc *crtc, 55 const struct drm_display_mode *mode, 56 struct drm_display_mode *adjusted_mode) 57 { 58 /* accept the provided drm_display_mode, do not fix it up */ 59 drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); 60 return true; 61 } 62 63 static int 64 sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode) 65 { 66 struct sti_mixer *mixer = to_sti_mixer(crtc); 67 struct device *dev = mixer->dev; 68 struct sti_compositor *compo = dev_get_drvdata(dev); 69 struct clk *clk; 70 int rate = mode->clock * 1000; 71 int res; 72 73 DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n", 74 crtc->base.id, sti_mixer_to_str(mixer), 75 mode->base.id, mode->name); 76 77 DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n", 78 mode->vrefresh, mode->clock, 79 mode->hdisplay, 80 mode->hsync_start, mode->hsync_end, 81 mode->htotal, 82 mode->vdisplay, 83 mode->vsync_start, mode->vsync_end, 84 mode->vtotal, mode->type, mode->flags); 85 86 /* Set rate and prepare/enable pixel clock */ 87 if (mixer->id == STI_MIXER_MAIN) 88 clk = compo->clk_pix_main; 89 else 90 clk = compo->clk_pix_aux; 91 92 res = clk_set_rate(clk, rate); 93 if (res < 0) { 94 DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate); 95 return -EINVAL; 96 } 97 if (clk_prepare_enable(clk)) { 98 DRM_ERROR("Failed to prepare/enable pix clk\n"); 99 return -EINVAL; 100 } 101 102 sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ? 103 compo->vtg_main : compo->vtg_aux, &crtc->mode); 104 105 res = sti_mixer_active_video_area(mixer, &crtc->mode); 106 if (res) { 107 DRM_ERROR("Can't set active video area\n"); 108 return -EINVAL; 109 } 110 111 return res; 112 } 113 114 static void sti_crtc_disable(struct drm_crtc *crtc) 115 { 116 struct sti_mixer *mixer = to_sti_mixer(crtc); 117 struct device *dev = mixer->dev; 118 struct sti_compositor *compo = dev_get_drvdata(dev); 119 120 DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); 121 122 /* Disable Background */ 123 sti_mixer_set_background_status(mixer, false); 124 125 drm_crtc_vblank_off(crtc); 126 127 /* Disable pixel clock and compo IP clocks */ 128 if (mixer->id == STI_MIXER_MAIN) { 129 clk_disable_unprepare(compo->clk_pix_main); 130 clk_disable_unprepare(compo->clk_compo_main); 131 } else { 132 clk_disable_unprepare(compo->clk_pix_aux); 133 clk_disable_unprepare(compo->clk_compo_aux); 134 } 135 136 mixer->status = STI_MIXER_DISABLED; 137 } 138 139 static void 140 sti_crtc_mode_set_nofb(struct drm_crtc *crtc) 141 { 142 sti_crtc_enable(crtc); 143 sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); 144 } 145 146 static void sti_crtc_atomic_begin(struct drm_crtc *crtc, 147 struct drm_crtc_state *old_crtc_state) 148 { 149 struct sti_mixer *mixer = to_sti_mixer(crtc); 150 151 if (crtc->state->event) { 152 crtc->state->event->pipe = drm_crtc_index(crtc); 153 154 WARN_ON(drm_crtc_vblank_get(crtc) != 0); 155 156 mixer->pending_event = crtc->state->event; 157 crtc->state->event = NULL; 158 } 159 } 160 161 static void sti_crtc_atomic_flush(struct drm_crtc *crtc, 162 struct drm_crtc_state *old_crtc_state) 163 { 164 struct drm_device *drm_dev = crtc->dev; 165 struct sti_mixer *mixer = to_sti_mixer(crtc); 166 struct sti_compositor *compo = dev_get_drvdata(mixer->dev); 167 struct drm_plane *p; 168 169 DRM_DEBUG_DRIVER("\n"); 170 171 /* perform plane actions */ 172 list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { 173 struct sti_plane *plane = to_sti_plane(p); 174 175 switch (plane->status) { 176 case STI_PLANE_UPDATED: 177 /* update planes tag as updated */ 178 DRM_DEBUG_DRIVER("update plane %s\n", 179 sti_plane_to_str(plane)); 180 181 if (sti_mixer_set_plane_depth(mixer, plane)) { 182 DRM_ERROR("Cannot set plane %s depth\n", 183 sti_plane_to_str(plane)); 184 break; 185 } 186 187 if (sti_mixer_set_plane_status(mixer, plane, true)) { 188 DRM_ERROR("Cannot enable plane %s at mixer\n", 189 sti_plane_to_str(plane)); 190 break; 191 } 192 193 /* if plane is HQVDP_0 then commit the vid[0] */ 194 if (plane->desc == STI_HQVDP_0) 195 sti_vid_commit(compo->vid[0], p->state); 196 197 plane->status = STI_PLANE_READY; 198 199 break; 200 case STI_PLANE_DISABLING: 201 /* disabling sequence for planes tag as disabling */ 202 DRM_DEBUG_DRIVER("disable plane %s from mixer\n", 203 sti_plane_to_str(plane)); 204 205 if (sti_mixer_set_plane_status(mixer, plane, false)) { 206 DRM_ERROR("Cannot disable plane %s at mixer\n", 207 sti_plane_to_str(plane)); 208 continue; 209 } 210 211 if (plane->desc == STI_CURSOR) 212 /* tag plane status for disabled */ 213 plane->status = STI_PLANE_DISABLED; 214 else 215 /* tag plane status for flushing */ 216 plane->status = STI_PLANE_FLUSHING; 217 218 /* if plane is HQVDP_0 then disable the vid[0] */ 219 if (plane->desc == STI_HQVDP_0) 220 sti_vid_disable(compo->vid[0]); 221 222 break; 223 default: 224 /* Other status case are not handled */ 225 break; 226 } 227 } 228 } 229 230 static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { 231 .enable = sti_crtc_enable, 232 .disable = sti_crtc_disabling, 233 .mode_fixup = sti_crtc_mode_fixup, 234 .mode_set = drm_helper_crtc_mode_set, 235 .mode_set_nofb = sti_crtc_mode_set_nofb, 236 .mode_set_base = drm_helper_crtc_mode_set_base, 237 .atomic_begin = sti_crtc_atomic_begin, 238 .atomic_flush = sti_crtc_atomic_flush, 239 }; 240 241 static void sti_crtc_destroy(struct drm_crtc *crtc) 242 { 243 DRM_DEBUG_KMS("\n"); 244 drm_crtc_cleanup(crtc); 245 } 246 247 static int sti_crtc_set_property(struct drm_crtc *crtc, 248 struct drm_property *property, 249 uint64_t val) 250 { 251 DRM_DEBUG_KMS("\n"); 252 return 0; 253 } 254 255 int sti_crtc_vblank_cb(struct notifier_block *nb, 256 unsigned long event, void *data) 257 { 258 struct sti_compositor *compo = 259 container_of(nb, struct sti_compositor, vtg_vblank_nb); 260 struct drm_crtc *crtc = data; 261 struct sti_mixer *mixer; 262 unsigned long flags; 263 struct sti_private *priv; 264 unsigned int pipe; 265 266 priv = crtc->dev->dev_private; 267 pipe = drm_crtc_index(crtc); 268 mixer = compo->mixer[pipe]; 269 270 if ((event != VTG_TOP_FIELD_EVENT) && 271 (event != VTG_BOTTOM_FIELD_EVENT)) { 272 DRM_ERROR("unknown event: %lu\n", event); 273 return -EINVAL; 274 } 275 276 drm_crtc_handle_vblank(crtc); 277 278 spin_lock_irqsave(&crtc->dev->event_lock, flags); 279 if (mixer->pending_event) { 280 drm_crtc_send_vblank_event(crtc, mixer->pending_event); 281 drm_crtc_vblank_put(crtc); 282 mixer->pending_event = NULL; 283 } 284 spin_unlock_irqrestore(&crtc->dev->event_lock, flags); 285 286 if (mixer->status == STI_MIXER_DISABLING) { 287 struct drm_plane *p; 288 289 /* Disable mixer only if all overlay planes (GDP and VDP) 290 * are disabled */ 291 list_for_each_entry(p, &crtc->dev->mode_config.plane_list, 292 head) { 293 struct sti_plane *plane = to_sti_plane(p); 294 295 if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) 296 if (plane->status != STI_PLANE_DISABLED) 297 return 0; 298 } 299 sti_crtc_disable(crtc); 300 } 301 302 return 0; 303 } 304 305 int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) 306 { 307 struct sti_private *dev_priv = dev->dev_private; 308 struct sti_compositor *compo = dev_priv->compo; 309 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb; 310 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 311 312 DRM_DEBUG_DRIVER("\n"); 313 314 if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ? 315 compo->vtg_main : compo->vtg_aux, 316 vtg_vblank_nb, crtc)) { 317 DRM_ERROR("Cannot register VTG notifier\n"); 318 return -EINVAL; 319 } 320 321 return 0; 322 } 323 324 void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe) 325 { 326 struct sti_private *priv = drm_dev->dev_private; 327 struct sti_compositor *compo = priv->compo; 328 struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb; 329 struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; 330 331 DRM_DEBUG_DRIVER("\n"); 332 333 if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ? 334 compo->vtg_main : compo->vtg_aux, vtg_vblank_nb)) 335 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); 336 337 /* free the resources of the pending requests */ 338 if (compo->mixer[pipe]->pending_event) { 339 drm_crtc_vblank_put(crtc); 340 compo->mixer[pipe]->pending_event = NULL; 341 } 342 } 343 344 static const struct drm_crtc_funcs sti_crtc_funcs = { 345 .set_config = drm_atomic_helper_set_config, 346 .page_flip = drm_atomic_helper_page_flip, 347 .destroy = sti_crtc_destroy, 348 .set_property = sti_crtc_set_property, 349 .reset = drm_atomic_helper_crtc_reset, 350 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, 351 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, 352 }; 353 354 bool sti_crtc_is_main(struct drm_crtc *crtc) 355 { 356 struct sti_mixer *mixer = to_sti_mixer(crtc); 357 358 if (mixer->id == STI_MIXER_MAIN) 359 return true; 360 361 return false; 362 } 363 364 int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, 365 struct drm_plane *primary, struct drm_plane *cursor) 366 { 367 struct drm_crtc *crtc = &mixer->drm_crtc; 368 int res; 369 370 res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, 371 &sti_crtc_funcs, NULL); 372 if (res) { 373 DRM_ERROR("Can't initialze CRTC\n"); 374 return -EINVAL; 375 } 376 377 drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); 378 379 DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", 380 crtc->base.id, sti_mixer_to_str(mixer)); 381 382 return 0; 383 } 384